/*
 * Copyright Thoughtworks, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {ConfigOptions} from "config/variables";
import webpack from "webpack";

export function threadLoader(configOptions: ConfigOptions): webpack.RuleSetUseItem {
  return {
    loader: "thread-loader",
    options: {
      workers: 2,
      workerNodeArgs: ['--max-old-space-size=512'],
      // keep workers alive in watch mode
      poolTimeout: configOptions.watch ? Infinity : 500
    }
  };
}
